I do not think that it is see-a-doctor-in-24-hours urgent, a psych evaluation in a few days is good, and definitely mention these symptoms.
The sounds in the lab depend on what the sounds were, and who couldn't hear it. My daughter can hear many higher pitched sounds that I cannot.
Migraines could also be the cause of visual and auditory hallucinations, especially random noises and vague movements (rather than clear voices or vivid images). Also, all of these can be indices by stress and anxiety.
Your daughter is still in her teens though, isn't she? Except for the PI, I'm the oldest person in the lab.
Some of the sounds are like beeping alarms. Sometimes it's a machine-like hum. I've wandered around the lab, but it's hard to pinpoint location.
Sometimes I think I hear footsteps or people talking (usually sounds like mumbling). Rarely I hear specific words, sometimes whispered, sometimes shouted from a distance. But hearing these things occasionally has been going on for years (unlike the pushing feelings and seeing things moving out of the corner of my eye). I never thought too much of it or mentioned it to a doctor. I thought it was one of those things that everybody gets sometimes.
A few times, I have answered a doctor's question of "Have you ever heard or seen things that weren't really there?" with "I'm not sure." They always respond with "OK" and move on to the next question. No one's ever asked me to elaborate.